1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
/*
Miranda IM: the free IM client for Microsoft* Windows*
Copyright 2000-2010 Miranda ICQ/IM project,
all portions of this codebase are copyrighted to the people
listed in contributors.txt.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "..\..\core\commonheaders.h"
#include "plugins.h"
static IMAGE_SECTION_HEADER *getSectionByRVA(IMAGE_SECTION_HEADER *pISH, int nSections, IMAGE_DATA_DIRECTORY *pIDD)
{
for (int i=0; i < nSections; i++, pISH++)
if (pIDD->VirtualAddress >= pISH->VirtualAddress && pIDD->VirtualAddress + pIDD->Size <= pISH->VirtualAddress + pISH->SizeOfRawData )
return pISH;
return NULL;
}
MUUID* GetPluginInterfaces(const TCHAR* ptszFileName, bool& bIsPlugin)
{
bIsPlugin = false;
HANDLE hFile = CreateFile( ptszFileName, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL );
if (hFile == INVALID_HANDLE_VALUE)
return NULL;
MUUID* pResult = NULL;
BYTE* ptr = NULL;
HANDLE hMap = CreateFileMapping(hFile, NULL, PAGE_READONLY, 0, 0, NULL );
__try
{
if ( !hMap )
__leave;
DWORD dwHSize = 0, filesize = GetFileSize( hFile, &dwHSize );
if ( !filesize || filesize == INVALID_FILE_SIZE || dwHSize)
__leave;
if ( filesize < sizeof(IMAGE_DOS_HEADER) + sizeof(IMAGE_NT_HEADERS) )
__leave;
ptr = (BYTE*)MapViewOfFile(hMap, FILE_MAP_READ, 0, 0, 0);
if (ptr == NULL)
__leave;
PIMAGE_NT_HEADERS pINTH;
PIMAGE_DOS_HEADER pIDH = (PIMAGE_DOS_HEADER)ptr;
if ( pIDH->e_magic == IMAGE_DOS_SIGNATURE )
pINTH = (PIMAGE_NT_HEADERS)(ptr + pIDH->e_lfanew);
else
__leave;
if ((PBYTE)pINTH + sizeof(IMAGE_NT_HEADERS) >= ptr + filesize )
__leave;
if ( pINTH->Signature != IMAGE_NT_SIGNATURE )
__leave;
int nSections = pINTH->FileHeader.NumberOfSections;
if ( !nSections )
__leave;
INT_PTR base;
PIMAGE_DATA_DIRECTORY pIDD;
if ( pINTH->FileHeader.Machine == IMAGE_FILE_MACHINE_I386 &&
pINTH->FileHeader.SizeOfOptionalHeader >= sizeof(IMAGE_OPTIONAL_HEADER32) &&
pINTH->OptionalHeader.Magic == IMAGE_NT_OPTIONAL_HDR32_MAGIC)
{
pIDD = (PIMAGE_DATA_DIRECTORY)( (PBYTE)pINTH + offsetof( IMAGE_NT_HEADERS32, OptionalHeader.DataDirectory ));
base = *(DWORD*)((PBYTE)pINTH + offsetof(IMAGE_NT_HEADERS32, OptionalHeader.ImageBase));
}
else if ( pINTH->FileHeader.Machine == IMAGE_FILE_MACHINE_AMD64 &&
pINTH->FileHeader.SizeOfOptionalHeader >= sizeof(IMAGE_OPTIONAL_HEADER64) &&
pINTH->OptionalHeader.Magic == IMAGE_NT_OPTIONAL_HDR64_MAGIC)
{
pIDD = (PIMAGE_DATA_DIRECTORY)( (PBYTE)pINTH + offsetof( IMAGE_NT_HEADERS64, OptionalHeader.DataDirectory ));
base = *(ULONGLONG*)((PBYTE)pINTH + offsetof(IMAGE_NT_HEADERS64, OptionalHeader.ImageBase ));
}
else __leave;
// Export information entry
DWORD expvaddr = pIDD[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress;
DWORD expsize = pIDD[IMAGE_DIRECTORY_ENTRY_EXPORT].Size;
if (expsize < sizeof(IMAGE_EXPORT_DIRECTORY)) __leave;
BYTE* pImage = ptr + pIDH->e_lfanew + pINTH->FileHeader.SizeOfOptionalHeader + sizeof(IMAGE_NT_HEADERS) - sizeof(IMAGE_OPTIONAL_HEADER);
IMAGE_SECTION_HEADER *pExp = getSectionByRVA((IMAGE_SECTION_HEADER *)pImage, nSections, pIDD);
if ( !pExp) __leave;
BYTE *pSecStart = ptr + pExp->PointerToRawData - pExp->VirtualAddress;
IMAGE_EXPORT_DIRECTORY *pED = (PIMAGE_EXPORT_DIRECTORY)&pSecStart[expvaddr];
DWORD *ptrRVA = (DWORD*)&pSecStart[pED->AddressOfNames];
WORD *ptrOrdRVA = (WORD*)&pSecStart[pED->AddressOfNameOrdinals];
DWORD *ptrFuncList = (DWORD*)&pSecStart[pED->AddressOfFunctions];
MUUID* pIds;
bool bHasLoad = false, bHasUnload = false, bHasInfo = false, bHasMuuids = false;
for (size_t i=0; i < pED->NumberOfNames; i++, ptrRVA++, ptrOrdRVA++) {
char *szName = (char*)&pSecStart[*ptrRVA];
if ( !lstrcmpA(szName, "Load"))
bHasLoad = true;
if ( !lstrcmpA(szName, "MirandaPluginInfoEx"))
bHasInfo = true;
else if ( !lstrcmpA(szName, "Unload"))
bHasUnload = true;
else if ( !lstrcmpA(szName, "MirandaInterfaces")) {
bHasMuuids = true;
pIds = (MUUID*)&pSecStart[ ptrFuncList[*ptrOrdRVA]];
}
// old plugin, skip it
else if ( !lstrcmpA(szName, "MirandaPluginInterfaces"))
__leave;
}
// a plugin might have no interfaces
if (bHasLoad && bHasUnload && bHasInfo)
bIsPlugin = true;
if (!bHasLoad || !bHasMuuids || !bHasUnload)
__leave;
int nLength = 1; // one for MIID_LAST
for (MUUID* p = pIds; !equalUUID(*p, miid_last); p++)
nLength++;
pResult = (MUUID*)mir_alloc( sizeof(MUUID)*nLength);
if (pResult)
memcpy(pResult, pIds, sizeof(MUUID)*nLength);
}
__finally
{
if (ptr) UnmapViewOfFile(ptr);
if (hMap) CloseHandle(hMap);
CloseHandle(hFile);
};
return pResult;
}
|
